This is the 262nd most frequent Hindi word.
आई
The Hindi word "आई" means "mother" in English.
Here, 'आई' means 'came' and is used as a feminine verb in the past tense.
मेरे घर में आज मेहमान आई।
Today, a guest came to my house.
In this context, 'आई' refers to 'mother' in a familial sense, often used in Marathi-inflected Hindi.
यह किताब मेरी मां आई थी।
This book belongs to my mother.
Here, 'आई' is used as a verb in the past tense and refers to the action 'arrived' for a feminine noun like 'train'.